All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
We congratulate you on your repentance and determination to adhere to the Islamic rulings in your day-to-day life. In fact, a Muslim should take the matter of his religion very seriously since he will be held accountable in front of Allaah for his every deed.
Allaah welcomes every repentant regardless of his sins and forgives all his sins if he sincerely repents. For more details read Fatwa: 81467.
We advise you to cut off all your relations with the girl since it leads to much harm and strengthens Satan against you. Islam does not allow you to have any personal relationship with an alien girl (marriageable). For details please read Fatwa: 84281.
Singing and music are not allowed in Islam, so one should not engage in any forbidden act. We mentioned the proofs that prohibits music in our Fatwa: 81545 and 81239.
The idea of giving up Haraam step by step is not acceptable. So, one should trust in Allaah, seek His help, and should give up all sins. Details are discussed in our previous Fataawa: 86436, 85477, 85277 and 84845.
We supplicate Allaah to pour His blessings upon you and make you stead-fast on His True Religion.
Allaah knows best.